1、Observation of the color
Don’t buy the food packaging printing vague, rubbing printing and packaging bags clear hand. If you find the bag easy decolorization, you can’t buy, because the packaging quality and material is not good, there is no safety factor.
2、Smell the smell
Found in food packaging bags and disgusting pungent tast not to buy.
3、The use of white plastic bags of food
Try not to use the red and black plastic bag, because the colored plastic bags may be the use of recycled materials or natural materials used without to pollution treatment and its crude production, easy to mildew deterioration, failure or contaminated food, and pollution.
4、Buy enamel tableware depends on the smooth surface and the coating is uniform or not
Note there is gap, scaling, and porcelain, explosion, crack, pan boiling mark, Kong Pao and Lu black phenomenon.